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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .fontStyle {
            font-style: italic;
            /* 是字体倾斜 */
            /* normal 正常 要给斜体标签(em , i)改为不倾斜字体。*/
        }
    </style>
</head>
<body>
    <span class="fontStyle">字体</span>
</body>
</html>